Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.4 cc 57341111 It has all the advantages

It has all the advantages of the best shaft type conversion kits

Features:Designed for racing applications with an MSD 7 Series Ignition ControlEfficient E-core winding design produces more voltage and current85:1 turns ratio and lower primary resistance produce high voltage outputWindings are encased in red epoxy and secured with extruded bracketsSpark plug style terminal and threaded brass primary studsSupplied with rubber shock mountsNo CARB Exemption Order Number

For Use With 322/364/401/425 cu

Specially designed to extend gear and bearing life

Speed Pro Speed Pro Piston Forged 4.030" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.4 cc 57341111 It has all the advantagesFully updated skirt profiles Exclusive DUROSHIELD skirt coating. DUROSHIELD provides scuff resistance, reduced bore clearances and enhanced ring sealing. SPEED PRO POWERFORGED pistons are built to stringent specifications with a precision CNC machined dome and skirts and microfinished ring grooves. The manufacturing process ensures that piston weights within a boxed set will not vary more than 4 grams and that skirt sizes are matched to within 0.